A semi-active vibration-absorbing device with adjustable mass

Abstract

The invention aims to provide a quality-adjustable semi-active vibration absorption device. The device comprises a bracket, an upper fixing plate, a lower fixing plate, a first proportional electromagnet, a second proportional electromagnet, a mass block and a spring, wherein the upper fixing plate and the lower fixing plate are fixed to the bracket; the first proportional electromagnet is connected with the upper fixing plate and the mass block; the second proportional electromagnet is connected with the lower fixing plate and the mass block; the mass block is connected with the spring; and the spring is connected with a vibration absorption object. According to the device, the equivalent mass of the mass block can be indirectly changed, so that a complicated mechanical structure required for directly changing the mass of the mass block is avoided; the proportional electromagnets can realize horizontal force output property in a large displacement range, namely, the force output is only related to the magnitude of a coil current in the large displacement range and unrelated to the amplitude, so that the control precision is ensured; and meanwhile the mass can be changed in a wider range, so that a good vibration absorption effect in a wider frequency band is achieved.

Description

technical field [0001] The invention relates to a vibration control device, in particular to a vibration absorbing device. Background technique [0002] With the development of industrial technology and the improvement of people's quality of life, the requirements for vibration reduction and noise reduction are increasing. The task of vibration control is to make the vibration level of the controlled object meet people's predetermined requirements through certain means. Vibration absorption is a kind of vibration reduction technology widely used in engineering. The so-called vibration absorption is to redistribute the vibration energy by adding a subsystem to the main system, that is, to transfer the vibration energy on the main system to the additional subsystem, thereby suppressing the vibration of the main system. [0003] Most of the traditional vibration absorbing devices are passively controlled, which have the characteristics of simple structure and low price, but t...

AI Technical Summary

Problems solved by technology

For the electromagnetic vibration absorber proposed in patent 200720027716.6, the air gap between the electromagnet and the iron core will obviously change during the working process, and this has a great influence on the electromagnetic force, and it is difficult to adjust the stiffness to required value

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